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Two doctors who evaluated Pilkington say trauma and lead poisoning as a child, and a borderline low IQ impaired her ability to withstand coercive interrogation from police, according to affidavits filed with the court in 2017.
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Logan County Judge Mark O'Connor ordered an independent psychiatric evaluation, a decision that was upheld by an appeals court last month.
Pilkington's lawyers appealed to the Ohio Supreme Court Tuesday, arguing the evaluation would violate constitutional rights against self-incrimination.
Pilkington is scheduled to face a four-week-long trial starting on Jan. 7, 2019, according to online court records.